Word: blood
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...classes of cancer therapies. While older drugs were like heavy artillery - obliterating cancer cells but causing lots of collateral damage - newer drugs are more like smart bombs. Some of them target communication signals within malignant cells, some cut off supply lines by interfering with the growth of blood vessels around a tumor, and others block the chemical agents that enable tumors to expand into new territory. These more targeted therapies tend to focus on frantically proliferating cancer cells while leaving healthy cells intact...
...only one drug, a chemotherapy agent, available to treat colon cancer, and it wasn't very effective. In the past decade, more chemotherapy drugs, which are easier on the body, and new classes of targeted therapies, which specifically block a tumor's ability to recruit growth factors and blood vessels, have improved the survival of patients...
...small micrometastases that seed repeat growths; PET scans rely on the tumor's voracious appetite for glucose for energy, but until the tumor's activity reaches a certain threshold, it won't show up on the scan. So researchers are working on finding protein markers in the blood released by tumor cells that spread outside the colon; experts believe that cancer cells that venture outside the original tumor are equipped with special markers that could be detected, hopefully with something as simple as a blood test...
...much of the discussion about the war's toll on Iraqi society centers on the numbers of dead and wounded - victims of Sunni suicide bombers, Shi'ite militias, American arms. Yasser's story is a reminder of the millions whose lives have been destroyed without a single drop of blood shed. Who keeps count of wounded hopes and dead dreams...
...attention of police, the men announced they were holding two teachers and an estimated 30 children hostage. The men said they were armed with an Uzi submachine gun and hand grenades, although Ducat insisted that he didn't intend to hurt the children. "In case I need to shed blood, I will not be the first to fire," he told the radio station. "I am telling the policemen, have pity on these children...